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EMBRYONIC DEVELOPMENT & STEM CELL COMPENDIUM
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All in Vivo Cells > Cell Card
Bone
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Rostral Skull Membranous Bones
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Intramembranous Preosteoblasts (RSMBs)


Bn.RSMBs.InPCs

Intramembranous preosteoblasts are cells in the inner layer of the periosteum that develop into osteoblasts. Theses cells secrete the osteoid, the organic non-mineralized portion of the bone matrix which is formed before maturation of the bone.


Only 10-20% of vertebrate bones take on the intramembranous ossification fate. Bones of the cranial vault (calvarium; flat bones) form through the process of intramembranous ossification.
Prenatal
Intramembranous Preosteoblasts
Multiple Ancestors Single Ancestor No Descendants Develops from Part of Parent